body {
    margin: 0px;
    background-color: rgba(255, 255, 255, 0.996078431372549);
    background-image: url('../img/bg.png');
    background-position: center center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-size: cover;
    background-origin: border-box;
    position: relative;
    left: 0px;
    width: 100%;
    margin-left: auto;
    margin-right: auto;
    text-align: left;
}

/* so the window resize fires within a frame in IE7 */
html, body {
    height: 100%;
}


.left,.right{
    position: absolute;
    height: 100%;
}

.left{
    width: 30%;
    display: flex;
    flex-direction: column;
}

.zhaiyao,.jianjie{
    position: relative;
    width: 80%;
    left: 10%;
    box-shadow: 10px 10px 5px rgb(0,0,0,0.3);
}
.zhaiyao{
    min-height: 300px;
    margin-top:12%;
    height: auto;
    border:1px solid gray;
    border-radius: 0 0 18px 0;
    background: whitesmoke;
}

.jianjie{
    height: 25%;
    margin-top: 12%;
    background: whitesmoke;
    border-radius: 12px;
}

.right{
    left:30%;
    width: 70%;
    transform-style: preserve-3d;
    transition: transform 1.5s;
    transform-origin: center;
}

.flipped {
    transform: rotateY(180deg);
}

.right>div:nth-child(1)>div{
    position: absolute;
    width: 80%;
    left: 10%;
}

.right>div:nth-child(1)>div:nth-child(1){
    top:3%;
    height: 30px;
    font-size: 25px;
    font-style: italic;
    font-weight: bolder;
    text-align: center;
}

.right>div:nth-child(1)>div:nth-child(2){
    top:12%;
    height: auto;
    min-height: 300px;
    background: whitesmoke;
    border-radius: 0 0 30px 0;
    box-shadow: 10px 10px 5px rgb(0,0,0,0.4);
}

.front,.back{
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
}

.back{
    background: whitesmoke;
    transform: rotateY(180deg);
}

p{
    font-size: 18px;
}